Who each provider tends to suit
Knowlarity
Knowlarity is a long-established Indian cloud communication provider covering business calling, routing and related capabilities, and it now sits within a larger messaging group following an acquisition. For buyers, that raises reasonable questions about roadmap and support structure alongside the usual capability assessment, and those questions are best asked directly rather than inferred.
Exotel
Exotel is widely used by Indian businesses that want both configurable call handling and programmable capability, and it tends to appear in evaluations where engineering is involved in the decision. As with any platform, the useful question is not the breadth of the catalogue but whether the two or three flows your business depends on can be built, monitored and changed quickly.